Window shade



Dec. 24, 1940. w. KOFLER I 2,226,131

WINDOW SHADE Filed Feb. 12, 1940 3 Sheets-Sheet 1 Dec. 24, 1940. w. KOFLER WINDOW SHADE Filed Feb. 12. 1940 H"! III w. KOFLER WINDOW SHADE Dec. 24, 1940.

Filed Feb. 12, 1940 3 Sheets-Sheet 3 Patented Dec. 24,1940

' UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to that class of devices, used to protect window embrasures from the passage of too vivid rays of light, commonly called shades.

Such shades should be adjustable for heighth,

inclination, admission of air and light, convene iently and easily operated, and of such sturdy construction as to resist wear indefinitely.

This, then, is the principal object of the inven- 10 tion, together with certain novel and characteristic features, whereby an ornamental and highly efiective shade is produced.

The invention involves many distinctive features as hereinafter described and shown in the ac- 15 companying drawings, constituting an important component of this disclosure, and in which:

Figure 1 is a general perspective View, looking from the inside of an embodiment of the invention as applied to a conventional window, parts 20, being broken away to show the construction.

Figure 2 is a partial front elevational view of the same, showing its application, certain parts being in section and others broken away.

Figure 3 is a vertical sectional view taken sub- 25, stantially on'line 3-3 of Figure 2.

Figure 4 is a fragmentary transverse sectional view taken on line 4-4 of Figure 2.

Figure 5 is a partial front elevational view of a pair of the shade slats as united.

Figure 6 is a transverse sectional view taken on line 6-6 of Figure 5.

Figure '7 is a bottom plan view of one of the shade elements in detail.

Figure 8 is a partial side, partial sectional view '35; of shade operating mechanism.

Figure 9 is a sectional view taken on line 99 of Figure 8.

Figure 10 is a transverse sectional view taken substantially on line |DI of Figure 2. In the drawings the numeral l designates in general the window frame embrasure having a sill l5, rearwardly of which are the walls of a chamber I! provided with a cover l8, and in front of the chamber is the usual bevelled seat IQ for 45' the slidable glazed sashes 2U-2l, respectively lower and upper.

Above the runway for the sashes is a partition 22 forming a flooring for a compartment 23 having a top 24 and sides 2526, respectively at the 50 front and rear, and end walls 2'! at the sides of the casing.

Rotatably mounted centrally in the end walls is a shaft 30 having flanges 3| at its end, and fixed on the shaft, near one end, is a deeply grooved 55 pulley 32 on which is partially coiled a strap 33 extending through an opening in the floor 22 downwardly in the casing, to a grooved pulley 34 fixed on a shaft 35 mounted horizontally in the chamber H.

A coiled spring 36 on this shaft is housed in a casing 31 within the chamber, and below, in register with the sash, is a woven wire screen 38, one of its ends being coilable around the shaft 35' and the other, upper end, to the bottom of the lower sash, so that as the sash is raised the screen follows, being guided in the casing grooves 39.

The strap 33 passes through an opening in the chamber cover I8 past a rounded block 40 set in a narrow casing 4|, while on the other side of the strap is a dog 42 having teeth opposed to the block.

The dog is pivoted at 43 in the casing 4| and has an upwardly extending lever portion 44 provided with a slot 44 through which the strap 33 passes and in such manner as to control the grip of the dog by manipulating the strap.

Returning to the shaft 30, it will be seen in Figures 2 and 3 that a screen, generally designated 45, is attached at its extreme upper end to the shaft to be coiled thereon as the strap 33 is raised and lowered.

The screen is composed of a plurality of light, hollow members each having fiat parallel sides 46 slightly spaced apart, connected at their lower edges by inreaching angular elements 41 and having at two or more points along their lengths, at the apex of the angles, relatively wide and narrow slots 4849.

The opposite, upper edges of the side members are simularly connected by raised angular elements 50 and set at intervals therein are flat stems 5! having beaded enlargements 52 at their outer ends. 1

The beads 52 can be passed through the side slots 48 and then the shade members shifted lengthwise so that the stems 5| enter the narrow slots 49 in the next succeeding shade member, lockingly engaging them, but permitting free swinging action.

The free, lower end of the screen thus formed is directed, as it is drawn downwardly, by plates 55 at the sides of the sashes and outer guides 56 fixed in parallel therewith on the window casing.

At about midway in the length of the window, hinges 51 connect the lower sections 58 of the guides 56, these lower sections having outer channel elements 59 and attached thereto are leaves 60, pivoted below the hinges 51 and adapted to open fanwise as best seen in Figure 1. 5s

The outer, wider ends of the leaves 60 contain slots 62 to receive pins 63 fixed in the next succeeding leaf to guide them when opening and closing.

Pivoted to the frame, as at 65, are the inner elements 66, of braces hingedly connected to outer elements 61, as at 68, in turn pivoted to the screen guide frames and by which the screen, and its frame, may be turned inwardly of the window, at an angle and positively held in such position.

From the foregoing description and showing it will be seen that a light, but strong screen has been disclosed, that can be raised, lowered or positioned at an angle, in an easy manner and which is quite capable of general utility.

Having thus described the invention, what is claimed as new and sought to secure by Letters Patent, is:

1. A shade structure comprising a plurality of light weight hollow bars having parallel sides and narrow side edges, one of the edges presenting sharp angled concavities and the other correspondingly convex, said concave edges having relatively wide and narrow slots open one to the other, stems set in the apices of the convex edges, and beads on the extremities of said stems, said beads to pass through the wide slots and said stems to engage in the narrow slots.

2. A shade structure comprising a plurality of light weight hollow bars having parallel sides and narrow side edges, said edges having interrelating angular surfaces respectively concave and convex, said concave edges having spaced openings relatively wide and narrow, and detents fixed in said convex edges to pass through the wide openings and lockingly engage in the narrow openings.

WILLI KOFLER. 

